公路隧道内火灾烟气温度及层化高度分布特征试验  

Experiment of Fire Smoke Temperature and Layer Stratification Height Distribution Characteristic Along Highway Tunnel

作　　者：胡隆华[1] 霍然[1] 王浩波[1] 杨瑞新[2] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230027 [2]云南省公安消防总队,云南昆明650228

出　　处：《中国公路学报》2006年第6期79-82,共4页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50376061);教育部高等学校博士学科点专项科研基金项目(20030358051)

摘　　要：通过在云南昆明—石林高速公路阳宗隧道内的现场模拟火灾试验,对不同纵向通风速率下公路隧道内火灾烟气温度及层化高度沿隧道的分布特征进行了研究。结果表明:拱顶下方烟气温度沿隧道呈幂指数分布;纵向通风速度对烟气层高度沿隧道的分布有重大影响,纵向风速较小时,烟气可以在隧道上部空间维持较好的层化结构,不会影响火灾发生时人员的安全疏散,而较大的纵向风速将导致烟气层高度沿隧道迅速降到地面,对火灾发生时的人员疏散造成威胁。Field fire simulation experiments were conducted in the Yangzong Tunnel of KunmingShilin freeway in Yunnan Province of China. Characteristics of smoke layer temperature and layer stratification height distribution along the tunnel were measured at normal ventilation speed, natural ventilation speed and smoke exhaust ventilation speed conditions. Results show that the smoke temperature below the ceiling along the tunnel falls into exponential distribution and the longitudinal ventilation speeds influence the smoke layer height distribution along the tunnel largely. When longitudinal wind speed is small, the smoke layer can be remained at the upper part of the tunnel and does little influence for the human evacuation; while smoke would be blown to the floor level and be dangerous for human evacuation when ventilation speed is relative large.

关 键 词：隧道工程 火灾 试验研究 烟气层高度 烟气温度 纵向通风 

分 类 号：U456.33[建筑科学—桥梁与隧道工程]